Kills TraceTicks, which was functionally the same as TimeTicks

cc/scheduler/begin_frame_tracker.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_SCHEDULER_BEGIN_FRAME_TRACKER_H_
 #define CC_SCHEDULER_BEGIN_FRAME_TRACKER_H_
 
 #include <set>
 #include <string>
 
@@ skipping 69 matching lines @@
 
  private:
   // Return if currently not between the start/end period. This method should
   // be used extremely sparingly and normal indicates incorrect management of
   // the BFA object. Can be called at any time.
   bool HasFinished() const { return !current_finished_at_.is_null(); }
 
   const tracked_objects::Location location_;
   const std::string location_string_;
 
-  base::TraceTicks current_updated_at_;
+  base::TimeTicks current_updated_at_;
   BeginFrameArgs current_args_;
-  base::TraceTicks current_finished_at_;
+  base::TimeTicks current_finished_at_;
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_BEGIN_FRAME_TRACKER_H_